Doping of alumina ceramics by manganese – Thermodynamical and experimental approach

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dc.contributor.authorSvoboda, Jiřícs
dc.contributor.authorDrdlíková, Katarinacs
dc.contributor.authorDrdlík, Danielcs
dc.contributor.authorKroupa, Alešcs
dc.contributor.authorMichalička, Jancs
dc.contributor.authorMaca, Karelcs
dc.coverage.issue1cs
dc.coverage.volume16cs
dc.date.accessioned2023-05-25T14:55:36Z
dc.date.available2023-05-25T14:55:36Z
dc.date.issued2022-03-27cs
dc.description.abstractThe preparation of a transparent ultra-fine-grained doped ceramics requires a homogeneous dopant distribution in a matrix. In the present work, two thermodynamical phenomena allowing the preparation of such ceramics (the dissolution of the dopant and the formation of undesirable secondary phases) were experimentally and theoretically studied. A general thermodynamic-kinetic model was developed for dopant dissolution, which was verified for the experimental conditions used in this work. The model and experiment showed that Mn3O4 dopant with overall concentration of 1 at.% and particle size of 50 nm is dissolved and homogenized in a fine-grained alumina matrix within less than one hour at a temperature of 1220 °C. For the purposes of the study of the formation of undesired secondary phase, the phase diagram of the Al2O3-Mn3O4 system was calculated using the CALPHAD approach. Detailed STEM observations combined with EDX and EELS chemical analyses showed that the data used for the calculation of the phase diagram need some modifications because they overestimate the solubility of Mn in the alumina and underestimate the solubility of Mn in the MnAl2O4 spinel.en
dc.formattextcs
dc.format.extent13-21cs
dc.format.mimetypeapplication/pdfcs
dc.identifier.citationProcessing and Application of Ceramics. 2022, vol. 16, issue 1, p. 13-21.en
dc.identifier.doi10.2298/PAC2201013Scs
dc.identifier.issn2406-1034cs
dc.identifier.other177570cs
dc.identifier.urihttp://hdl.handle.net/11012/204471
dc.language.isoencs
dc.publisherFaculty of Technology, University of Novi Sadcs
dc.relation.ispartofProcessing and Application of Ceramicscs
dc.relation.urihttp://www.doiserbia.nb.rs/Article.aspx?ID=1820-61312201013Scs
dc.rightsCreative Commons Attribution-NonCommercial-NoDerivatives 4.0 Internationalcs
dc.rights.accessopenAccesscs
dc.rights.sherpahttp://www.sherpa.ac.uk/romeo/issn/2406-1034/cs
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/4.0/cs
dc.subjectaluminaen
dc.subjectdopingen
dc.subjectsinteringen
dc.subjectelectron energy loss spectroscopy (EELS)en
dc.subjectthermodynamicsen
dc.titleDoping of alumina ceramics by manganese – Thermodynamical and experimental approachen
dc.type.driverarticleen
dc.type.statusPeer-revieweden
dc.type.versionpublishedVersionen
sync.item.dbidVAV-177570en
sync.item.dbtypeVAVen
sync.item.insts2023.05.25 16:55:36en
sync.item.modts2023.05.25 16:14:34en
thesis.grantorVysoké učení technické v Brně. Středoevropský technologický institut VUT. Pokročilá multifunkční keramikacs
thesis.grantorVysoké učení technické v Brně. Fakulta strojního inženýrství. ÚMVI-odbor keramiky a polymerůcs
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Pokročilá multifunkční keramika
ÚMVI-odbor keramiky a polymerů